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MrMuchimi
3 years ago
9

How do similarities in the bones of humans dolphins and horse and

Chemistry
1 answer:
Andrej [43]3 years ago
6 0
It provides evidence that each organism is related and similar in each way, leading to the conclusion of a common ancestor.<span />
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Two types of stoichiometry are; molar mass and coefficients from balanced equation.
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A chemist weighed out 19.9 g of aluminum. Calculate the number of moles of aluminum she weighed out.
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miss Akunina [59]

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2 years ago
Three common ores of iron are FeO, Fe2O3, and Fe3O4. Iron ores are often reduced to elemental iron by heating in the presence of
brilliants [131]

Answer:

Answers are explained below

Explanation:

(a)

Oxidation number of iron :

FeO = +2

Fe2O3= +3

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(c) In a pure iron metallic bond is exist between the particles of Fe. But in the form of ore metals forms ionic bond with the non-metals.

Hence the properties vary.

Yes carbon steel has greater strength than that of pure iron but retains the property of iron because no chemical reaction occurs between carbon and iron.

d)

Mixing of carbon in iron is a type of physical change since there is no chemical reactions occur between the carbon and iron. Carbon atoms diffuses in the place between the iron atoms.

(f) One of the property of non-metals are brittleness. It is non ductile .

So when the percentage of carbon increases its atoms also occupying more and more free places.

And increasing the brittleness. So the iron becomes less ductile.

e)

6 0
3 years ago
Which of the following models a synthesis reaction?
Nuetrik [128]

Answer: D

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